Carbon Budget Remaining Calculator
Estimate the remaining global carbon budget for a target temperature limit based on current emission rates.
Budget Remaining
260 Gt CO2
Budget Remaining vs Years Elapsed Since 2020
公式
## The Global Carbon Budget The carbon budget is the total amount of CO2 that can still be emitted while keeping global warming below a specific temperature target. ### Formula **Remaining Budget = Total Budget - (Annual Emissions x Years Elapsed)** **Years Left = Remaining Budget / Annual Emissions** The IPCC estimates that for a 50% chance of staying below 1.5°C, the remaining budget from 2020 was about 500 Gt CO2. At current rates of ~40 Gt/year, this budget is rapidly shrinking.
计算示例
Starting budget of 500 Gt CO2 from 2020 with 40 Gt/year emissions, 6 years later.
- 01CO2 used = 40 x 6 = 240 Gt CO2
- 02Remaining = 500 - 240 = 260 Gt CO2
- 03Years left = 260 / 40 = 6.5 years
- 04Budget used = 240 / 500 x 100 = 48.0%
常见问题
What is a carbon budget?
A carbon budget is the maximum cumulative amount of CO2 that can be emitted while still having a reasonable chance of limiting warming to a specific temperature target.
Is the 1.5°C budget already exhausted?
It is very close. At current emission rates, the budget for a 50% chance of staying below 1.5°C may be exhausted by the late 2020s.
Does the budget account for other greenhouse gases?
Carbon budgets typically focus on CO2 but assume certain trajectories for methane and other gases. Higher non-CO2 emissions reduce the effective CO2 budget.